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Instead, medics argue testosterone levels fall - a process described as ‘late-onset hypogonadsim - as men age and could even be linked to obesity and diabetes.

A report in Pulse claims the ‘continued rise’ in testosterone prescribing has seen the prescribing of testosterone rise from 20 per cent since 2012 which could cost the NHS £20m a year.

A 2016 report by health watchdog the Care Quality Commission - better known as the CQC - has revealed testosterone and testosterone undecanoate are in the top ten most commonlyprescribed controlled drugs in England and Wales.

Some GPs are unsure just how helpful prescribing testosterone really is, with the hormone being prescribed like oestrogen is for women.

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Some men are suffering from hypogonadism where the testes produce few hormones

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Professor Mike Kirby, GP and visiting professor to the Prostate Centre, London, told Pulse: “Since the introduction of Viagra, and more interest in erectile problems, more men are being tested for testosterone deficiency – that’s been a major driver of it.’

He added the rise in prescribing could because GP has a greater awareness of the problem of testosterone deficiency.

However Dr Martin Daerden North Wales GP said he believed the products should be used ‘very cautiously’.

“I think we should use these products very cautiously unless there are clear clinical explanations for hypogonadism other than age,” he said.

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Viagra is prescribed to some men who suffer from erectile dysfunction instead of testosterone

Some attribute the symptoms of the ‘male menopause’ to lifestyle issues - stress, depression, anxiety, lack of sleep or poor diet.

But in some cases, where lifestyle or psychological problems don't seem to be responsible, NHS choices said the the symptoms of the male menopause may be the result of hypogonadism, where the testes produce few or no hormones.

Hypogonadism is sometimes present from birth, which can cause symptoms like delayed puberty and small testes.